Pressure reducing valve - Direct Acting for steam - RE1 | Miyawaki | Philippopoulos s.a.
Pressure reducing valve - Direct Acting for steam - RE1 | Miyawaki | Philippopoulos s.a.

Pressure reducing valve - Direct Acting for steam - RE1 | Miyawaki

Miyawaki RE1 Direct-Acting Pressure Reducing Valve for Steam

The Miyawaki RE1 is a self-operated pressure reducing valve designed for small to medium steam flow applications. The downstream pressure is sensed in the control chamber, directly adjusting the valve opening without the need for electric or pneumatic actuators. Adjustment is performed via the top handle.

Technical Specifications

  • Sizes: 1/2”, 3/4”, 1”.
  • Connection: Threaded Rc or NPT.
  • Body Material: Brass C3771.
  • Maximum Operating Temperature TMO: 204°C.
  • Maximum Pressure Reduction Ratio: 10:1.
  • Minimum Differential Pressure: 20% of primary pressure.
  • Lock-up Pressure: up to 0.03 MPa.
  • Recommended Upstream Filter: Y-strainer YM1.

Pressure Versions

The RE1 handles inlet pressures from 0.2–1.6 MPa with an outlet setting of 0.05–1.0 MPa. The RE1-4 covers inlet pressures from 0.2–1.0 MPa and an outlet of 0.05–0.4 MPa. The RE1-2 is used for very low downstream pressures of 0.02–0.2 MPa. Kvs values range from 1.0 to 2.8 m³/h, depending on size and version.

Applications

Suitable for localized steam pressure reduction in small consumers, laundries, food equipment, sterilizers, and compact thermal units. Not intended for large flow central stations; selection should be based on the capacity chart with p1, p2, and steam flow.

Installation

Installation is in horizontal piping, with the adjustment section facing upwards. Requires straight sections at least 10 × DN before and after the valve, pressure gauges, isolation valves, bypass, upstream strainer 60–80 mesh, and steam trap before and/or after the valve for condensate removal.

FAQ

When to choose RE1-2?
When downstream pressure below 0.2 MPa or low pressure with increased flow is required.

What if the reduction ratio exceeds 10:1?
Reduction should be considered in two stages, with a distance of more than 3 m between the two reducers.

Standard (Options)
  • DIN
  • ANSI
Connection (Options)
  • BSP
Material (Options)
  • Brass CW 617N
Pressure Rating (Options)
  • 1,0 - 1,6 Mpa

Description

Features

Self acting pressure reducing valve for steam

Automatic valve that reduces the steam supply pressure to a defined set pressure.

Pressure fluctuations on upstream side are followed by the downstream side.

No external energy required

Compact and cost effective design

Can be installed in tight spaces thanks to its compact design (small/lightweight). Offers reliable operation, energy saving, and productivity improvement.

Easy handling

Pressure can easily adjusted by the topside handle.

Operating features of direct acting pressure reducing valves

Downstream pressure changes are detected in the detection chamber, and the degree of opening of the valve is directly adjusted to maintain the set pressure.

Superb durability

Control bellows with moren than ... operating cycles offers outstanding durability. Protected by integrated strainer.

Typical applications

Perfect for small to medium steam flows as present in laundries, F&B equipment, sterilizers and similar equipment.

Dimensions/Weight

RE1_124_Rc
SizeDimensions (mm)Dimensions (in)Weight
LH1H2WLH1H2W(kg)(lb)
1/2”8013746653.25.41.82.61,43.1
3/4”903.51,63.5
1”105144584.15.72.31,94.2

Specifications

ModelConnection

Max.

operating

 

pressure (PMO)

operating

pressure range

Control

pressure range

Values

Max. pressure

reduction ratio

Max. operating

temperature

(TMO)

Body

material

TypeSize(MPa)(psig)

Primary side

pressure

(MPa)

Primary side

pressure

(psig)

Secondary side

pressure

(MPa)

Secondary side

pressure

(psig)

Cvkvs(℃)(℉)
RE1

Screwed

Rc,NPT

1/2”1,62300,2 - 1,629 - 2300,05 - 1,07.3 - 145 1,2  1,0  10:1204399

Brass

C3771

3/4”1,91,6
1”3,22,8
RE1-21/2”1,01450,2 - 1,029 - 1450,02 - 0,22.9 - 291,91,6
3/4”1,91,6
1”2,1  1,8   
RE1-41/2”1,01450,2 - 1,029 - 1450,05 - 0,47.3 - 581,21,0
3/4”1,91,6
1”3,22,8

● Recommended accessories: Y strainer / YM1  x1

● Offset: RE1: 0.15MPa (21.8psig) or lower, RE1-2: 0.05MPa (7.3psig) or lower, RE1-4: 0,07MPa (10.2psig) or lower

● Minimum differential pressure: 20% of the primary side

● Lockup pressure: 0,03MPa (4.4psig) or lower

Capacity Chart (MPa)

RE1

RE1_MPa

● How to use this chart

1. Find the point at which the upstream pressure and desired downstream pressure horizontal line intersect.

2. Trace a vertical line from the point where they intersect, and select for the smallest-nominal size where the required steam flow rate met.

*for downstream pressures from 0,4MPa (58psig) (4kgf/cm2・g) to 0,2MPa (29psig) (2kgf/cm2・g) or lower, use RE1-4 model.

  for downstream pressures from 0,2MPa (29psig) (2kgf/cm2・g) or lower with high flow rate, RE1-2 is recommended.

RE1-2

RE1-2_MPa

RE1-4

RE1-4_MPa

Capacity Chart (psig)

RE1

RE1_psig

● How to use this chart

1. Find the point at which the upstream pressure and desired downstream pressure horizontal line intersect.

2. Trace a vertical line from the point where they intersect, and select for the smallest-nominal size where the required steam flow rate meet.

*for downstream pressures from 0,4MPa (58psig) (4kgf/cm2・g) to 0,2MPa (29psig) (2kgf/cm2・g) or lower, use RE1-4 model.

  for downstream pressures from 0,2MPa (29psig) (2kgf/cm2・g) or lower with high flow rate, RE1-2 is recommended.

RE1-2

RE1-2_psig

RE1-4

RE1-4_psig